Diagnostic magnetic resonance apparatus having a radio frequency

Details Diagnostic magnetic resonance apparatus having a radio frequency Diagnostic magnetic resonance apparatus having a radio frequency

1995-01-18

1996-11-12

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

335301, 324322, 1286535, G01R 3328

Patent

active

055743722

ABSTRACT:
In a diagnostic magnetic resonance apparatus having an examination space, a radio-frequency antenna and a gradient coil system, the radio-frequency antenna is arranged closer to the examination space than is the gradient coil system. A radio-frequency shield arranged between the radio-frequency antenna and the gradient coil system, and has a first electrically conductive layer arrangement and a second electrically conductive layer arrangement arranged lying opposite the first arrangement, these being separated from one another by a dielectric. The layer arrangements have interconnects arranged side-by-side that are separated from one another by electrically insulating slots. The slots of the first layer arrangement are arranged offset relative to the slots in the second layer arrangement. Neighboring interconnects in at least one layer arrangement are connected to one another via bridges that conduct high-frequency currents, the bridges being arranged such that currents induced in the layer arrangement by the radio-frequency antenna can essentially flow only between the neighboring interconnects via the bridges.

REFERENCES:
patent: 4871969 (1989-10-01), Roemer et al.
patent: 4924184 (1990-05-01), Yoda
patent: 5243286 (1993-09-01), Rzedzian
patent: 5367261 (1994-11-01), Frederick
patent: 5396173 (1995-03-01), Sakakura et al.

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